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INTANGIBLE ASSETS - Schedule of Intangible Assets Acquired (Detail) - USD ($) $ in Millions | 12 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Goodwill | $ 1,349 | $ 256
Intangible assets not subject to amortization | 1,491 |
Intangible assets subject to amortization | 680 |
intangible Assets, Acquired During the Period | 2,171 |
Goodwill |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Goodwill | 1,349 |
Trademarks and trade names |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets not subject to amortization | 142 |
Technology |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 366 |
Amortization Period (in years) | 20 years |
Order backlog |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 56 |
Order backlog | Minimum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Amortization Period (in years) | 1 year |
Order backlog | Maximum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Amortization Period (in years) | 3 years |
Customer relationships |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 258 |
Amortization Period (in years) | 20 years |

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